[openib-general] Interrupt Threshold Rate equivalent in Infiniband NIC

[harish]

Hi Roland,

As regards the CQ notification frequency, I noticed that the function
req_ncomp_notif used by ib_req_ncom_notif is not implemented yet. I was
hoping that if this was implemented, I would just use ib_req_ncom_notif with
a count of 10 in place of ib_req_com_notif.  Please share your comments on
this approach and it will be great if you have a patch with the
ib_req_ncom_notif implementation.

Thanks in advance,
harish

On 8/29/06, Roland Dreier <rdreier at cisco.com> wrote:
>
>     harish> Hi Roland, Thanks a lot for the prompt response. Could you
>     harish> please let me know as to what is the expected time frame
>     harish> for having NAPI for IPoIB implemented.  Also as regards to
>     harish> the first question, would it make sense to play around
>     harish> with the cq notification frequency. Will it help to reduce
>     harish> the CPU utilization/ interrupt overhead?
>
> I can't tell you when NAPI will be implemented, since I don't know if
> anyone is working on it.
>
> You could try playing around with the CQ notification frequency but if
> you're going to hack the driver then I think it would be just as easy
> to implement NAPI.  Anyway, give it a try and let us know your results.
>
> Thanks,
>   Roland
>
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